[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 55.121267][ T27] audit: type=1800 audit(1563572007.079:25): pid=8527 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 55.166372][ T27] audit: type=1800 audit(1563572007.079:26): pid=8527 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 55.188982][ T27] audit: type=1800 audit(1563572007.089:27): pid=8527 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.154' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 80.514347][ T8680] netlink: 4 bytes leftover after parsing attributes in process `syz-executor618'. [ 80.523905][ T8680] kasan: CONFIG_KASAN_INLINE enabled [ 80.529295][ T8680] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 80.537531][ T8680] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 80.544563][ T8680] CPU: 1 PID: 8680 Comm: syz-executor618 Not tainted 5.2.0-next-20190718 #41 [ 80.553406][ T8680] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 80.563462][ T8680] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 80.569038][ T8680] Code: 00 00 48 c7 c7 80 c0 da 88 e8 10 6e a1 fb 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c7 85 e8 fe ff ff 00 00 00 00 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 e2 [ 80.588871][ T8680] RSP: 0018:ffff888094826eb8 EFLAGS: 00010246 [ 80.594933][ T8680] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff110121ac1a9 [ 80.602893][ T8680] RDX: 0000000000000000 RSI: 1ffff110121ac1b0 RDI: 0000000000000282 [ 80.610842][ T8680] RBP: ffff888094827060 R08: 0000000000000002 R09: ffff888090d60d50 [ 80.618799][ T8680] R10: fffffbfff134a3ff R11: ffffffff89a51fff R12: 0000000000000001 [ 80.626824][ T8680] R13: ffff88809b512480 R14: ffff8880948278c0 R15: 0000000000000000 [ 80.634896][ T8680] FS: 0000555556cc1880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 80.643817][ T8680] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 80.650385][ T8680] CR2: 0000000020000180 CR3: 0000000095f41000 CR4: 00000000001406e0 [ 80.658517][ T8680] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 80.666602][ T8680] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 80.674549][ T8680] Call Trace: [ 80.677834][ T8680] ? tc_lookup_action_n+0xd2/0x100 [ 80.683058][ T8680] ? __add_metainfo+0x480/0x480 [ 80.687896][ T8680] ? tc_lookup_action_n+0xd2/0x100 [ 80.693005][ T8680] ? __kasan_check_read+0x11/0x20 [ 80.698026][ T8680] ? lock_downgrade+0x920/0x920 [ 80.702913][ T8680] ? __kasan_check_write+0x14/0x20 [ 80.708014][ T8680] ? do_raw_read_unlock+0x3f/0x70 [ 80.713027][ T8680] tcf_action_init_1+0x6f2/0xa80 [ 80.717962][ T8680] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 80.724187][ T8680] ? tcf_action_dump_old+0x80/0x80 [ 80.729287][ T8680] ? lock_downgrade+0x920/0x920 [ 80.734118][ T8680] ? __kasan_check_read+0x11/0x20 [ 80.739116][ T8680] ? mark_lock+0xc0/0x11e0 [ 80.743595][ T8680] tcf_action_init+0x241/0x360 [ 80.748354][ T8680] ? tcf_action_init_1+0xa80/0xa80 [ 80.753447][ T8680] ? mark_lock+0xc0/0x11e0 [ 80.757845][ T8680] ? mark_lock+0xc0/0x11e0 [ 80.762240][ T8680] ? __kasan_check_read+0x11/0x20 [ 80.767250][ T8680] tcf_action_add+0xe8/0x370 [ 80.771871][ T8680] ? tca_action_gd+0x1710/0x1710 [ 80.776905][ T8680] ? refcount_dec_not_one+0x1f0/0x1f0 [ 80.782260][ T8680] ? __nla_parse+0x43/0x60 [ 80.786666][ T8680] tc_ctl_action+0x3b5/0x4bc [ 80.791235][ T8680] ? tcf_action_add+0x370/0x370 [ 80.796069][ T8680] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 80.802463][ T8680] ? tcf_action_add+0x370/0x370 [ 80.807379][ T8680] rtnetlink_rcv_msg+0x463/0xb00 [ 80.812291][ T8680] ? rtnetlink_put_metrics+0x580/0x580 [ 80.817727][ T8680] ? lock_downgrade+0x920/0x920 [ 80.822553][ T8680] ? netlink_deliver_tap+0x22d/0xbf0 [ 80.827826][ T8680] ? find_held_lock+0x35/0x130 [ 80.832573][ T8680] netlink_rcv_skb+0x177/0x450 [ 80.837317][ T8680] ? rtnetlink_put_metrics+0x580/0x580 [ 80.842750][ T8680] ? netlink_ack+0xb30/0xb30 [ 80.847321][ T8680] ? __kasan_check_read+0x11/0x20 [ 80.852321][ T8680] ? netlink_deliver_tap+0x254/0xbf0 [ 80.857691][ T8680] rtnetlink_rcv+0x1d/0x30 [ 80.862096][ T8680] netlink_unicast+0x531/0x710 [ 80.866847][ T8680] ? netlink_attachskb+0x7c0/0x7c0 [ 80.872055][ T8680] ? _copy_from_iter_full+0x25d/0x8a0 [ 80.877416][ T8680] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 80.883122][ T8680] ? __check_object_size+0x3d/0x43c [ 80.888306][ T8680] netlink_sendmsg+0x8a5/0xd60 [ 80.893153][ T8680] ? netlink_unicast+0x710/0x710 [ 80.898073][ T8680] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 80.903795][ T8680] ? apparmor_socket_sendmsg+0x2a/0x30 [ 80.909238][ T8680] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 80.915465][ T8680] ? security_socket_sendmsg+0x8d/0xc0 [ 80.920996][ T8680] ? netlink_unicast+0x710/0x710 [ 80.925927][ T8680] sock_sendmsg+0xd7/0x130 [ 80.930482][ T8680] ___sys_sendmsg+0x803/0x920 [ 80.935147][ T8680] ? copy_msghdr_from_user+0x440/0x440 [ 80.940587][ T8680] ? prep_transhuge_page+0xa0/0xa0 [ 80.945687][ T8680] ? percpu_counter_add_batch+0x13c/0x190 [ 80.951385][ T8680] ? __do_page_fault+0x56a/0xdd0 [ 80.956303][ T8680] ? find_held_lock+0x35/0x130 [ 80.961090][ T8680] ? __do_page_fault+0x56a/0xdd0 [ 80.966011][ T8680] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 80.972230][ T8680] ? __fget_light+0x1a9/0x230 [ 80.976887][ T8680] ? __fdget+0x1b/0x20 [ 80.980941][ T8680] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 80.987163][ T8680] __sys_sendmsg+0x105/0x1d0 [ 80.991868][ T8680] ? __sys_sendmsg_sock+0xd0/0xd0 [ 80.996897][ T8680] ? down_read_non_owner+0x450/0x450 [ 81.002178][ T8680] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 81.007669][ T8680] ? do_syscall_64+0x26/0x6a0 [ 81.012344][ T8680] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 81.018478][ T8680] ? do_syscall_64+0x26/0x6a0 [ 81.023152][ T8680] __x64_sys_sendmsg+0x78/0xb0 [ 81.027898][ T8680] do_syscall_64+0xfd/0x6a0 [ 81.032379][ T8680] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 81.055153][ T8680] RIP: 0033:0x4401d9 [ 81.059203][ T8680] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 81.078832][ T8680] RSP: 002b:00007ffc53a88558 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 81.087239][ T8680] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401d9 [ 81.095285][ T8680] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 81.103474][ T8680] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 81.111555][ T8680] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a60 [ 81.119512][ T8680] R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 [ 81.127553][ T8680] Modules linked in: [ 81.132148][ T8680] ---[ end trace fee99ca8a0dbef99 ]--- [ 81.137908][ T8680] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 81.143378][ T8680] Code: 00 00 48 c7 c7 80 c0 da 88 e8 10 6e a1 fb 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c7 85 e8 fe ff ff 00 00 00 00 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 e2 [ 81.163017][ T8680] RSP: 0018:ffff888094826eb8 EFLAGS: 00010246 [ 81.169215][ T8680] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff110121ac1a9 [ 81.177215][ T8680] RDX: 0000000000000000 RSI: 1ffff110121ac1b0 RDI: 0000000000000282 [ 81.185389][ T8680] RBP: ffff888094827060 R08: 0000000000000002 R09: ffff888090d60d50 [ 81.193401][ T8680] R10: fffffbfff134a3ff R11: ffffffff89a51fff R12: 0000000000000001 [ 81.201397][ T8680] R13: ffff88809b512480 R14: ffff8880948278c0 R15: 0000000000000000 [ 81.209413][ T8680] FS: 0000555556cc1880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 81.218357][ T8680] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 81.225031][ T8680] CR2: 0000000020000180 CR3: 0000000095f41000 CR4: 00000000001406e0 [ 81.233050][ T8680] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 81.241221][ T8680] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 81.249268][ T8680] Kernel panic - not syncing: Fatal exception [ 81.256551][ T8680] Kernel Offset: disabled [ 81.260939][ T8680] Rebooting in 86400 seconds..